Constant-Mathurin Hillion (born 1830 in Mauron in France) was a French clergyman and Archbishop of the Roman Catholic Archdiocese of Port-au-Prince.
He was ordained in 1855.
He was appointed Bishop of Cap-Haïtien in Haïti in 1874, becoming Archbishop of Port-au-Prince in Haïti in 1886.
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